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No. 626,454. Patented June 6, I899.

' EFF. BRINTNALL.

WATER HEATER.

(Application filed June 22, 1898.)

(No Model.)

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UNTTnD STATES PATENT FFICE.

GEORGE P. BRINTNALL, OF BUFFALO, NElV YORK, ASSIGNOR OF TWO- THIRDS TOJACOB L. MENSOH AND CHARLES F. MENSCH, OF SAME PLACE.

WATER-HEATER.

SPECIFICATION forming part of Letters Patent No. 626,454, dated June 6,1899.

Application filed June 22, 1898- Serial No. 684,117. (No model.)

To all whom it may concern.-

Be it known that I, GEORGE P. BRINTNALL, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented certain new and useful Improvements in Water-Heaters; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to figures of reference marked thereon, whichform a part of this specification.

My invention relates to water-heaters employed for domestic purposes;and its object is to improve the construction of the same.

To this end the invention consists in certain details, as will be morefully hereinafter described and claimed.

In the drawings, ,Figure 1 is an elevation of my improved water-heatercomplete. Fig. 2 is a central vertical section of the same.

Referring to the drawings, 1 is the boiler, of usual cylindricalconfiguration, resting on the supports 2 and provided with the centraloutlet-orifice 3 in its bottom, preferably formed of a short piece ofpipe depending therefrom, as shown.

A short distance below the boiler 1 is the circular cast-metal heater 4,of larger diameter than the boiler 1, but of shallow configuration.

In its upper flat wall 5 is the central orifice 6, into and throughwhich projects the outletpipe 3 of the boiler.

The bottom 7 of heater tapers downwardly to the central outletorifice S,in which is fitted the tube 9. A pipe 10, having the fancet 11 at itsouter end, communicates with an orifice in the tube 9, which leads upinto the heater 4, thereby permitting the contents of the heater to bedrawn ofi when desired. On diametrically opposite sides of the heater atare the clean-out holes 12, provided with the screw-plugs 13. Around thebottom 7 of the heater and cast integral therewith is the annulardownwardly-extending wall or heatarrester 14. Secured in the lower endof the tube 9 is the rod 15, carrying at its lower end the disk-shapedgas-reservoir 16, inthe upper wall of which is arranged a series ofburners 17, each provided with an annular shoulder, (not shown,) uponwhich rests a mixer composed of the open tube 19, provided with a seriesof apertures in proximity with the burner for the admission of air formixture of the gas from the burner.

Surrounding the boiler, heater, and burners is the cylindricalsheet-iron jacket 21, of considerably larger diameter than the boiler 1.This jacket rests upon an annular shoulder on the cast-metal base orsupport 22, and within the jacket and also resting upon the base 22 isthe sheet-metal diaphragm 23, (see Fig. 2,) which forms a chamber 24between it and the floor upon which it rests. Ventilating-holes 25 areprovided in the side wall of the base to permit a free circulation ofair to offset the effect of the heat within the jacket 21. A series ofapertures 27 in the wall of the jacket 21 just above the diaphragm 23admit air to create a circulation up between the jacket and the boiler,an exit-passage 28 being provided at the upper end of the jacket tocarry off the products of combustion from the burners below. Thescrew-plugs 13 in the clean-out holes 12 of the heater extend outthrough the jacket 21 to permit of access to the interior of the heater4 without the necessity of removing the jacket. outside of the jacket21, as shown, and a sliding door 29 is also provided in the side wall ofthe jacket 21 to permit access to the burners.

3O 30 are two pipes seated in the upper wall 5 of the heater 4, near itsouter edge and diametrically opposite each other. They extend up midwaybetween the jacket and boiler and communicate with the upper part of theboiler through the branch pipes 31 31, which extend down through the topof the boiler, near its outer edge. Only one of these pipes The faucet11 is also may be employed or more than two, if deemed desirable.

Located upon the top 32 of the jacket 21 is ICO 34 is a pipe passingthrough the top of the boiler 1 and extending down into the boiler aboutthree-fourths of its depth. The pipe 34 is secured in the lower orificeof the coupling 36, and 37 is the supply-pipe, secured in the sideorifice and through which the water is fed into the boiler. Within thistube 34 is a brass tube or expansible rod which connects in anydesirable manner with the valve within the casing 33 for opening andclosing the same.

The operation of my improved heater just described is as follows: TheWater is fed from the supply-pipe 37 into the connecting-pipe 34:,extending down into the boiler, and is discharged therein through itsopen lower end. The water passes from the boiler into the heaterithrough outlet-orifice 3. The ignited gas from the burners strikes theinclined bottom 7 of the heater and is arrested or held back by theannular wall 14, which greatly increases its heating efficiency. Theheat after escaping from the bottom 7 passes up the annular chamberbetween the jacket and heater and out the exit-passage 28. The waterthus heated passes up the side pipes 30 30, and if no water is beingdrawn off it passes through the branch pipes 31 31 into the top of theboiler and assists in forcing the entering cold water into the heater,thus producing a circulating current on both sides of the boiler and ina downward direction. The effect of this action produces a rapid raisingof the temperature of the water in the boiler. Then, too, the surplusheat passing up and around the pipes 30 3O greatly assists in the rapidaction of my improved arrangement. The gas which is passing down thesupplypipe to the burners is also being superheated, as the pipe isinclosed between the boiler and jacket, and is therefore subjected tothe ascending heat in its passage to the outlet 28. This is anadditional advantage, as it necessarily increases the heating elficiencyof the burners. As theoold water passes down the interior pipe 34: andin contact with the inclosed brass tube it causes such tube to contract,

'which results in a raising of the valve, which is located within thecasin g and which controls the supply of gas for the burners. Apilot-light (not shown) ignites the escaping gas at the burners and theheatingoperation commences. If water is being drawn off, the valveremains open by reason of the incoming cold water, as just described;but if no water is being used the supply of cold water is checked, andwhen the water in the boiler is all heated to a high temperature itcauses the brass tube to close the valve and shut off the supply of gasto the burners. In this manner the supply of gas is automaticallyregulated and a safe temperature of the water in the boiler is all timesmaintained. The vertical arrangement ofthe pipes 30 30 is intended foruse with natural gas; but if illuminating or manufactured gas is used Iprefer that these pipes instead of running vertically to the top of thejacket 21 shall be coiled helically around the boiler in any desirablemanner. This arrangement greatly increases the heating action, andconsequently requires less gas for equal temperatures in the twoboilers.

With my improved form of heater it is possible to remove all sedimentdeposited therein without removing the jacket or disturbing any of theparts. This can be done by removing the screw-plugs from the clean-outholes for the insertion of a brush or otherinstrument to loosen up andseparate the foreign matter, which can afterward be washed out throughthe pipe 10 and faucet 11. My improved arrangement of providing acastmetal heater separate from the boiler, but communicatingtherewith,prevents the burning of the boiler, as the flame of the burners has nodirect contact with its surface at any point.

I have found by actual test that my boiler will heat the water sorapidly and effectively that I am enabled to obtain a constant supply ofheated water, as the heat action is so rapid that the water drawn offcomes directly from the heater, so that it is not necessary to waituntil the water in the boiler above is heated, thereby giving a constantsupply of hot water in a few minutes after the burners are lighted.

I claim- 1. The herein-described water-heater consisting of a jacket, aboiler within the jacket provided with a central outlet-pipe at itsbottom, a heater having an orifice through which this pipe projects,saidheater being constructed with a bottom tapering toward the center, a

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depending fiange on the bottom of the heater near its periphery,'a ringburner, and a rod connecting the center of the heater with the center ofthe burner for supporting the latter, substantially as and for thepurpose set forth.

2. The herein-described water-heater consisting of a jacket, a boilerwithin the jacket, a heatercommunicatingwith the boiler, said heaterbeing constructed with a bottom ta-

